CAGE21-3 Cruise Report: Ocean bottom seismics and acoustic surveys on the West-Svalbard margin – a study of local seismicity and its effect on methane seepage

Cruise CAGE21-3 with UiT’s research vessel R/V Helmer Hanssen was carried out to address the following objectives within the SEAMSTRESS project (Tectonic stress effects on Arctic methane seepage):1- Recovery of 10 Ocean Bottom Seismometers (OBS) deployed last year north of the Knipovich Ridge-Molloy...

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Bibliographic Details
Published in:CAGE – Centre for Arctic Gas Hydrate, Environment and Climate Report Series
Main Authors: Plaza-Faverola, Andreia, Schlindwein, Vera, Domel, Przemyslaw, Schmidt-Aursch, Mechita, Cooke, Frances Ann, Holm, Truls, Jensen, Stormer A.
Format: Article in Journal/Newspaper
Language:English
Published: Septentrio Academic Publishing 2022
Subjects:
fluid Flow
Vestnesa Basin
tectonics
OBS
acoustics
Arctic
Barents Sea
Hanssen
Knipovich Ridge
Molloy
Svalbard
arctic methane
Fram Strait
Ice Sheet
Sea ice
Svalbard margin
Svalbard-Barents Sea Ice sheet
Online Access:https://septentrio.uit.no/index.php/cage/article/view/6722
https://doi.org/10.7557/cage.6722
Description
Summary:Cruise CAGE21-3 with UiT’s research vessel R/V Helmer Hanssen was carried out to address the following objectives within the SEAMSTRESS project (Tectonic stress effects on Arctic methane seepage):1- Recovery of 10 Ocean Bottom Seismometers (OBS) deployed last year north of the Knipovich Ridge-Molloy Transform Fault corner (see report CAGE20-5).2- Conduction of an active source OBS experiment for the study of shear waves propagation in relation to local stress field and focused fluid flow.3- Acquisition of seismic lines for completing a side survey for the FRAME-IODP proposal.In 2020, 10 ocean-bottom seismometers (OBS) were deployed at the northern termination of the Knipovich Ridge to monitor seismic activity. The aim is to detect regional and local earthquakes. If localearthquakes are captured we will investigate the stress field in the region and how faults and fluids react to such stress (Figure 1). From the 10 instruments 8 are from Awi and 2 from UiT. IODP proposal 985 Eastern Fram Strait Palaeo-archive (FRAME) proposed to drill five sites on the western Svalbard margin in order to study chronostratigraphy, palaeoceanography, the palaeoclimatic evolution, and the forcing mechanisms responsible for main climatic transitions and the dynamics of the Svalbard Barents Sea Ice Sheet complex. This cruise acquired additional site survey seismic data for proposed primary and alternate drill sites. The cruise may be known as: CAGE21_3

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